论文信息 - A model for finite-deformation plasticity

A model for finite-deformation plasticity

SummaryWe propose a new large deformation viscoplastic model which includes the effects of static and dynamic recovery in its strain rate response as well as the plastic spin in its rotational response. The model is directly obtained from single slip dislocation considerations with the aid of a maximization procedure and a scale invariance argument. It turns out that the evolution of the back stress and the expression for the plastic spin are coupled within the structure of the theory. The model is used for the prediction of nonstandard effects in torsion, namely the development of axial stress and strain as well as the directional softening of the shear stress. The comparisons between the present continuum model and both experiments and self-consistent polycrystalline calculations are very encouraging.

Elias C. Aifantis | Douglas J. Bammann | E. Aifantis | D. Bammann

[1] R. Asaro,et al. Overview no. 42 Texture development and strain hardening in rate dependent polycrystals , 1985 .

[2] R. Hill,et al. XLVI. A theory of the plastic distortion of a polycrystalline aggregate under combined stresses. , 1951 .

[3] E. Aifantis. On the Structure of Single Slip and its Implications for Inelasticity , 1986 .

[4] W. Nix,et al. A numerical study of long range internal stresses associated with subgrain boundaries , 1980 .

[5] Elias C. Aifantis,et al. The physics of plastic deformation , 1987 .

[6] G. C. Johnson,et al. On the kinematics of finite-deformation plasticity , 1987 .

[7] Douglas J. Bammann,et al. An internal variable model of viscoplasticity , 1984 .

[8] Y. Dafalias. The plastic spin concept and a simple illustration of its role in finite plastic transformations , 1984 .

[9] E. Aifantis. On the Microstructural Origin of Certain Inelastic Models , 1984 .

[10] B. Loret. On the effects of plastic rotation in the finite deformation of anisotropic elastoplastic materials , 1983 .

[11] J. Mandel. Sur la définition de la vitesse de déformation élastique et sa relation avec la vitesse de contrainte , 1981 .

[12] E. Onat. Shear Flow of Kinematically Hardening Rigid-Plastic Materials , 1984 .

[13] Elias C. Aifantis,et al. On a proposal for a continuum with microstructure , 1982 .

[14] Shin Takeuchi,et al. Internal stresses in power-law creep , 1981 .